Ropinol Tablet 2 mg

৳ 6.00

Incepta Pharmaceuticals Limited

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Description

Ropinirole

Indications

Ropinirole is used alone or with other medicines to treat Parkinson’s disease. It helps to improve muscle control and movement difficulties. Thus, is also used to treat a condition called Restless Legs Syndrome (RLS). This condition is an overwhelming feeling of wanting to move the legs to make them comfortable from unpleasant sensations in the legs.

Therapeutic Class

Antiparkinson drugs

Pharmacology

Ropinirole binds the dopamine receptors D3 and D2. Although the precise mechanism of action of ropinirole as a treatment for Parkinson’s disease is unknown, it is believed to be related to its ability to stimulate these receptors in the striatum. This conclusion is supported by electrophysiologic studies in animals that have demonstrated that ropinirole influences striatal neuronal firing rates via activation of dopamine receptors in the striatum and the substantia nigra, the site of neurons that send projections to the striatum.

Dosage & Administration

In all clinical studies, dosage was initiated at a sub therapeutic level and gradually titrated to therapeutic response. The dosage should be increased to achieve a maximum therapeutic effect, balanced against the principal side effects of nausea, dizziness, somnolence and dyskinesia.

The recommended starting dose is 0.25 mg three times daily with or without food. Based on individual patient response, dosage should then be titrated with weekly increments as described in the table below. After week 4, if necessary, daily dosage may be increased by 1.5 mg per day on a weekly basis up to a dose of 9 mg per day, and then by up to 3 mg per day weekly to a total dose of 24 mg per day.

Ascending-Dose Schedule of Ropinirole:

  • First week: 0.25 mg three times daily. Total Daily Dose: 0.75 mg 
  • Second week: 0.5 mg three times daily. Total Daily Dose: 1.5 mg
  • Third week: 0.75 mg three times daily. Total Daily Dose: 2.25 mg
  • Fourth week: 1.0 mg three times daily. Total Daily Dose: 3.0 mg

Dosage greater than 24 mg/day have not been tested in clinical trials. Ropinirole should be discontinued gradually over a 7 day period. The frequency of administration should be reduced from three times daily to twice daily for 4 days. For the remaining 3 days, the frequency should be reduced to once daily prior to complete withdrawal of Ropinirole.

Interaction

Co-administration of Ropinirole with carbidopa or L-dopa or digoxin or theophylline did not show any interaction between them to hamper pharmacological effect. Co administration of ciprofloxacin (500 b.i.d.), an inhibitor of CYP1A2 ( enzyme responsible for Ropinirole metabolism), with Ropinirole (2 mg t.i.d.) increased Ropinirole AUC by 84%. Since ropinirole is a dopamine agonist, it is possible that dopamine antagonists, such as neuroleptics (phenothiazines, butyrophenones, thioxanthenes) or metoclopramide, may diminish the effectiveness of Ropinirole.

Contraindications

Ropinirole is contraindicated for patients known to have hypersensitivity to the product.

Side Effects

Some of the side effects that are known to be associated with Ropinirole are abdominal pain, swelling of the legs and ankles due to excess fluid retention (peripheral oedema), confusion, difficulty performing voluntary movements, resulting in jerky or involuntary movements or muscle twitches (dyskinesia), false perceptions of things that are not really there (hallucinations), nausea and vomiting, sleepiness (somnolence), fainting (syncope), slower than normal heart beat (bradycardia), profound drop in blood pressure (hypotension).

Pregnancy & Lactation

Pregnancy: Pregnancy category C. There are no adequate and well-controlled studies using Ropinirole in pregnant women. Ropinirole should be used during pregnancy only if the potential benefit outweighs the potential risk of the fetus.

Nursing Mothers: Ropinirole inhibits prolactin secretion in humans and could potentially inhibit lactation. Because of the potential for serious adverse reactions in nursing infants from Ropinirole, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother

Precautions

If a patient develops significant daytime sleepiness or episodes of falling asleep during activities that require active participation (e.g. conversations, eating, etc.), Riponirole should ordinarily be discontinued. If a decision is made to continue Ropinirole, patients should be advised to no drive and to avoid other potentially dangerous activities.

Overdose Effects

Symptoms include nausea, vomiting, visual hallucinations, hyperhidrosis, asthenia and nightmares. General supportive measures and monitoring of vital signs are recommended. May consider gastric lavage.

Use in Special Population

Pediatric Use: Safety and effectiveness of Ropinirole in the pediatric population have not been established.

Storage Conditions

Store in a cool and dry place, away from light. Keep out of reach of children.
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